Check /var/log/mythtv/mythbackend.log for error which say there are corrupt tables. Usually the recordmarkup or something similar, it has happened to me a couple of times. Almost always after a power outage.

Check /var/log/mythtv/mythbackend.log for error which say there are corrupt tables. Usually the recordmarkup or something similar, it has happened to me a couple of times. Almost always after a power outage.